21264572

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{39971}}^1$

素因数の和:40001

約数の個数: 24

約数和(自身を含む): 44768640

約数和(自身を除く): 23504068

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 39971, 79942, 159884, 279797, 559594, 759449, 1119188, 1518898, 3037796, 5316143, 10632286, 21264572]

約数ペア:

[(1, 21264572), (2, 10632286), (4, 5316143), (7, 3037796), (14, 1518898), (19, 1119188), (28, 759449), (38, 559594), (76, 279797), (133, 159884), (266, 79942), (532, 39971)]